Zyn Chill vs Zyn Smooth: Taste, WS-3, and Who Banned Them

Zyn Chill vs Zyn Smooth: Taste, WS-3, and Who Banned Them

Zyn Chill and Zyn Smooth are ZYN's two pouches marketed as "unflavored," both in 3 mg and 6 mg nicotine strengths. The difference is one ingredient. Chill contains WS-3, an odorless synthetic cooling agent that activates cold receptors without any mint flavor. Smooth has no cooling agent and no detectable flavor chemicals at all. The FDA classified both as flavored in its January 2025 PMTA authorization, which is why local health boards in Massachusetts pulled them from shelves in 2026.

Key Takeaways

• Chill feels cold, not minty. Its only major flavorant is WS-3 at 234 μg per pouch, an odorless compound that triggers the TRPM8 cold receptor (Jabba et al., Tobacco Control 2025).
• Smooth is the closest ZYN gets to plain. No cooling or flavor chemicals detected. The sweetness comes from an added sweetener.
• FDA says both are flavored. The sweetener is 39 to 77 times above the human recognition threshold. "Unflavored" is the manufacturer's label, not the regulator's.
• Bans are local, not statewide. Massachusetts towns enforced the state flavor law against both products starting March 2026. California declared Chill presumptively flavored effective January 1, 2025. Neither is discontinued nationally.

Zyn Chill vs Zyn Smooth at a Glance

Sources: Jabba et al., Tobacco Control 2025; FDA TPL Review; CA AG Notice 24-11-A9; Northerner. Prices before tax/shipping. See what a can costs in your state.

What Does Zyn Chill Taste Like?

Zyn Chill does not taste like mint. It feels cold.

WS-3 (N-ethyl-p-menthane-3-carboxamide) is an odorless synthetic cooling agent that activates TRPM8, the same cold receptor menthol targets, without menthol's aroma. In the Jabba et al. study (products purchased 2022, Tobacco Control 2025), gas chromatography found WS-3 at 234 ± 7 μg per pouch as the only major flavorant besides nicotine.

In cell assays (n = 3 to 4), Chill activated TRPM8 with 39% higher efficacy than Cool Mint and 53% higher than Peppermint, while triggering weaker TRPA1 irritant-receptor responses than both (48% and 52% lower). More cold, less bite. Lab result, not a human taste panel, but it matches what users report. ZYN Cool Mint relies on menthol (5,406 μg per pouch, Jabba et al.) and no WS-3. See every ZYN flavor ranked for the full lineup.

What Does Zyn Smooth Taste Like?

Smooth is the closest thing to a blank nicotine pouch ZYN makes.

The same Yale/Duke analysis found no cooling or minty flavorants in Smooth, "nor any other flavour chemical detectable with our method." The taste comes from a sweetener the FDA measured at 39 to 77 times the human recognition threshold. Faintly sweet, otherwise neutral. No cold, no mint, no fruit. For strength differences, see 3 mg vs 6 mg explained.

Are Zyn Chill and Smooth Unflavored? The FDA Answer

No. Not according to the agency that authorized them.

The FDA's TPL review states in footnote 4: "Due to added ingredients such as sweeteners and cooling agents, FDA has determined that all new products have a non-tobacco characterizing flavor." The reviewer noted the applicant called Smooth and Chill "flavored" in some parts of its applications and "unflavored" in others. Chill's cooling agent was "at least 5 times higher" than the 100 ppm level reported to produce cooling. The sweetener in both ran 39 to 77 times above recognition level.

Jabba et al. were more direct: the study authors concluded that the manufacturer's advertising of these products as "Flavour-Ban Approved" or "unflavoured" was "misleading." State flavor bans hinge on the word "flavored," so this classification matters.

Why Was Zyn Chill Banned in Massachusetts?

Massachusetts banned retail sale of flavored tobacco under M.G.L. c. 270, § 28, signed November 2019, with menthol restrictions from June 1, 2020. The law defines "characterizing flavor" as "a distinguishable taste or aroma, other than the taste or aroma of tobacco," and treats manufacturer flavor statements as "presumptive evidence."

No single statewide order pulled these products. Local boards applied the existing law after FDA classified both as flavored:

• March 2026: The Central Massachusetts Regional Health Department ordered 39 businesses in Shrewsbury, Grafton, and West Boylston to stop selling Zyn Chill and Zyn Smooth (3 mg and 6 mg).
• Separately: Needham's Board of Health has moved to bar Chill and cap nicotine pouch strength at 6 mg.
• July 2026: Peabody retailers were fined at least $1,000 each for selling Zyn Chill.
• September 24, 2026: Peabody's Board of Health unanimously revoked those fines, citing insufficient notice to retailers.

No statewide DPH or Attorney General action was found. Enforcement is municipal. Smooth was pulled alongside Chill because of its sweetener, not WS-3; the law covers any "distinguishable taste or aroma," and sweetness counts. The law also bars sale "online or through any other means to any consumer in the commonwealth."

Is Zyn Chill Banned in California?

Yes, since January 1, 2025. Attorney General Rob Bonta issued Notice of Determination 24-11-A9 on November 12, 2024, finding Zyn Chill 3 mg and 6 mg "presumptively FLAVORED" because its packaging communicates a cooling sensation. AB 3218 clarified that the state's flavor ban covers a cooling sensation (Health & Safety Code § 104559.5), which has restricted flavored tobacco since December 21, 2022. Smooth was not named.

Is Zyn Chill Discontinued?

No. Zyn Chill is not discontinued nationally.

Both remain FDA-authorized (PMTA January 2025, MRTP June 30, 2026). As of October 7, 2026, both were listed on Northerner at $4.49/can (6 mg, 1 to 5 cans) before tax and shipping; stock varies. Where Chill vanished, local enforcement is the reason, not a recall.

ZYN Ultra also includes FDA-authorized Chill (9 mg) and Smooth (9 mg and 11 mg) products. These are separate formulations. See ZYN Ultra vs regular ZYN and new ZYN flavor launches.

Cold vs Neutral, and Neither Is Flavor-Free

One delivers cold through a synthetic cooling compound. The other delivers nothing but sweetness and nicotine. Both were marketed as unflavored. Both were classified as flavored by the FDA. And both have been pulled from shelves in parts of Massachusetts because local regulators applied existing state law.

Pick Chill if you want cold without mint. Pick Smooth if you want neutral. Neither is flavor-free in the regulatory sense. For more options, see best-tasting nicotine pouches.

Frequently Asked Questions

Which is milder, Zyn Chill or Zyn Smooth?

Smooth is milder in taste. It has no cooling agent and no detectable flavor chemical. Chill delivers a pronounced cold sensation from WS-3. Nicotine strength is the same for both (3 mg or 6 mg), so the difference is sensation, not dose.

Does Zyn Chill have menthol?

No. The Jabba et al. analysis found WS-3 as Chill's only major flavorant. ZYN Cool Mint uses menthol (5,406 μg per pouch, Jabba et al.) and no WS-3. Both activate the TRPM8 cold receptor through different compounds.

What is WS-3?

WS-3 (N-ethyl-p-menthane-3-carboxamide) is an odorless synthetic cooling agent that activates the TRPM8 receptor without menthol's smell or taste. It is used in food, beverages, and oral care products. In Zyn Chill, it was measured at 234 ± 7 μg per pouch.

Why is Zyn Smooth banned in some Massachusetts towns?

Because of its sweetener, not WS-3. Smooth has no detectable cooling or flavor chemicals, but the FDA found its sweetener concentration is 39 to 77 times above the human recognition threshold. That sweet taste qualifies as a "characterizing flavor" under M.G.L. c. 270, § 28.

Can I still buy Zyn Chill online in Massachusetts?

The state law bars sale of flavored tobacco products "in any retail establishment, online or through any other means to any consumer in the commonwealth." Online sales to Massachusetts consumers are covered by the ban.

Is Zyn Chill FDA approved?

Zyn Chill is FDA authorized, not approved. FDA authorized 20 ZYN products, including Chill, through PMTAs in January 2025 and granted MRTP orders on June 30, 2026. "Authorized" means FDA found the product appropriate for the protection of public health, not "approved" in the way that term applies to drugs.

If You Liked Chill for the Ritual, Not the Nicotine

Most Chill users describe liking a sensation, not a flavor: a cool, clean pouch in the lip, a pause that does not taste like candy or smell like anything. If what you want is the cool pouch and the pause, that does not require nicotine.

Roon is a caffeine pouch, not a nicotine product and not a substitute for one. Cool Mint flavor (not neutral), zero nicotine, zero sugar, contains sucralose. Each pouch has 80 mg caffeine, 60 mg L-theanine, 25 mg methylliberine (Dynamine) and 5 mg theacrine (TeaCrine). In a randomized crossover PK study (n = 12), methylliberine slowed caffeine clearance from 41.9 to 17.1 L/hr and extended half-life from 7.2 to 15 hours with no higher peak. That study used 100 mg methylliberine with 150 mg caffeine, four times and about 1.9 times Roon's doses. The 6 to 8 hour felt window is directionally consistent with the mechanism, not measured by the study. Last pouch 8 hours before bed.

From $9.16 per tin (12-tin subscription, $0.61 per pouch) or $15.00 per tin one-time for 4 tins. 30-day money-back guarantee on a first order. If you are ready to keep the ritual and drop the nicotine, try Roon.

Written by Roon Team